Canvas belting.



J. B. HAY.

CANVAS BELTING.

APPLICATION FILED SEPT. 23, 1911.

1,022,080. Patented Apr. 2, 1912.

m1, Wf/f/Q JOHN B. HAY, OF YOUNGSTOWN, OHIO.

CANVAS BEDDING.

$pectflc'atlon of Letters Patent.

Patented Apr. 2, 1912.

Application filed September 23, 1911. Serial No. 650,956.

To all whom it may concern:

Be it known that I, JOHN B.'HAY, a sub- {ect of the King of Great Britain and Ire-. and, residing at Youngstown, county of Mahoning, and State of Ohio, have invented certain new: and useful Improvements in Canvas Belting", of which, the following is a specification.

Myinvention relates to belting for machinery and particularly to endless canvas belting.

The object of my invention is to provide an endless canvas belt formed of a plurality of laps or plies-of such construction that the several plies-shall be securely interlocked.

A further object of my invention is to rovide a belt as mentioned .in which the iieat which is always generated when belts pass over small pulleys shall cause the parts or plies to more firmly lock or adhere to each other.

' A further object of my invention is to provide a belt of the class mentioned which shall more snugly hug the crown of the pulleys than belts of the usual construction.

A further ob'ect' of my invention is to provide a belt ormed of several plies and of such construction that the oil an grease cannot work its way in between the edges of the several plies.

Other objects will appear hereinafter.

With these objects in view my invention consists generally ina belt formed of a single strip of canvas of the proper width wrapped one ply upon the other until the desired thickness is obtained and in means for locking the ends of the strip into the next adjacent ply.

My invention further consists in a belt characterized as above in which the first lap or layer is provided with integral lateral extensions wh1ch are folded over all of the other laps with the exception of the last or outer lap, the ed es of the extensions forming a butt joint t roughout the length of the belt,

and the outer la being secured over said extensions, where y all of the laps are securely interlocked.

My invention further consists in a belt constructed as above stated in which the canvas is previously saturated or treated with balata gum and in which each of the plies is secured in position separately by hot pressing the same upon the previous plies.

My invention further consists in various details of construction and arrangements of parts all as will be fully described hereinafter and particularly pointed out in the claims.

My invention will be more readily understood "by reference to the accoin anying drawing forming a part of this specification and in which t Figure 1 is a plan view of a blank from which a belt is made embodying my invention in its preferred form 2 is a perspective view illustrating the first lap in position with the free end locked, and .a portion of the second lap Fig. 3 is a similar view illustrating all of the laps in position with the exception of the last, the extentions folded in and the last lap about to be secured in position over the extensions, Fig. 4 is a plan view of a portion of the completed belt illustrating the manner of securing the outer end of the blank or strip, alnd Fig. 5 is a cross section on the line arr-w of Fig. 4 drawn upon an ,enlarged scale.

'is to be timesthe number of laps of which it is to be com osed. At one end the blank is formed wit lateral extensions 2, each equal or slightly greater in width than half the width of the belt and extending in length the distance of the length of the completed belt. The extensions 2 are integral with the body 1 of the blank and the portion of the blank or, strip from which they extend forms the first or inner lap of the device. Extending from the first la ortion 3, and at the opposite end thereo ii'om the long stri 1, 1s a short tongue 4 e ual in width to t at of the stri 1 and provided with lateral notches 5. xtending transversely of the body 1 adjacent'theo posite ends of the extensions 2 18 8. slit 6 t rough which the tongue 4 is inserted to lock'the first lap as shown clearly in Fig. 2. Adjacent the extreme opposite end of the bod 1 are a pair of latera notches 7, and at a ista'nce therefrom equal to the length of the outer la is a transverse slit 8 throu h which the en of the strip is inserted, loc ing the same in a manner similar to that above described for the inner end or tongue 4. The length of the blank or strip 1 between the slits 6 and 8 is equal to the length of the belt times the number of laps desired less two, the portion 3 forming the first lap and that between the notches 7 and slit 8- the last or outer lap.

In making the belt the canvas blank is first treated or impregnated with 'balata gum. The tongue 4 is then inserted through the slit 6 as indicated in Fig:2.- This forms the first lap of the belt securely locked with the ends of the portions 2 abutting. The

strip 1 is then wrapped around the first lap,

layer upon layer, until the belt is as thick as desired with the exception of one lap, each lap being hot pressed in position as it is wrapped about the first laps. The extensions 2 are then folded inwardly over the several laps, with their edges abutting, and are hot pressed-to secure them in position.

The last lap is then wrapped in position 'laps together with the exception of the outer lap, and thisouter lap locks the portions 2,-

thereby looking all together. Furthermore, the heat generated while the belt is in use and running rapidly over the pulleys acts tions 2 prevent oil and grease from working in between the several .plies' which would tend to cause the same to separate and be otherwise objectionable.

Having described my invention what I claim as new and desire to. secure by Letters Patent is v -1. belt of the class described, formed of a .singlestrip of canvas wrapped longitudinally layer upon layer forming a plurality of plies and the free ends of said strip being locked into the next adjacent ply, substantially as described.

2. A belt of the .class described, formed of a single strip of canvas wrapped longitudinally layer upon layer forming a plurality of plies, and provided with integral lateral extensions on the first ply, said extensions being folded over the edges of the succeeding plies and secured between the last ply and next to the last ply, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

J OHNB. HAY.

Witnesses:

ALEXANDER CAMPBELL, JoHN STEWART. 

